In going thru some of my books, the following railroads had the Train Master:
Canadian National
Canadian Pacific
CNJ
Delaware, Lackwana & Western
Penn
Reading
Southern Pacific
Southern
Virginian
Wabash
The CN and CP only had one each. Virginian led the pack with 25. Reading had 17 and the SP had 14.
In 1956, under license, the Canadian Locomotive Company manufactured some of them.
For a while SP used them to pull the commuter trains between San Francisco and San Jose.
Matt